herobullet.java

这个是最早期的一个飞行射击游戏 简单实现了地图滚动 子弹碰撞 与 UI等

package newgame;

import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;

public class HeroBullet extends Base {


    int speedx, speedy; //速度
    Image img;
    Image shadow;
    int frameWidth, frameHeight;
    Tools tool;
    boolean visble; //可见不可见
    int x, y; //坐标
int type; //类型
    Canvas1 mc;
    final int bullet1 = 1;//中间
    final int bullet2 = 2; //左
    final int bullet3 = 3;//右

 static   int frameCntX; //子弹图片X指针
   static int frameCntY; //子弹图片Y指针

    public HeroBullet(Canvas1 mc, int type) {
        frameWidth=15;
        frameHeight=24;
        this.mc = mc;
        tool = new Tools(this.mc);
        this.type = type;
        switch (mc.hero.type) {
        case 0:
            img = tool.getImage("/H1_bullet.png");
            break;
        case 1:
            img = tool.getImage("/H2_bullet.png");
            break;
        case 2:
            img = tool.getImage("/H3_bullet.png");
            break;

        }

    }


    public void setPosition(int x, int y) {
        this.x = x;
        this.y = y;
        switch (type) {
        case bullet1:
            speedx =0;
            speedy = -7;
            break;
        case bullet2:
            speedx = -3;
            speedy = -7;

            break;
        case bullet3:
            speedx = +3;
            speedy = -7;
            break;

        }
        this.setVisble(true);

    }

    public void move() {
            this.x += speedx;
            this.y += speedy;
    }

    public void paint(Graphics g) {
        if (this.isVisble()) {
            switch (type) {
            case bullet1:
                tool.drawPartImage(g, img, x, y, frameCntX * 15, frameCntY * 24,
                                   15, 24); //中间子弹
                break;
            case bullet2:
                tool.drawPartImage(g, img, x, y, frameCntX * 15, frameCntY * 24,
                                   15, 24); //左侧子弹
                break;
            case bullet3:
                tool.drawPartImage(g, img, x, y, frameCntX * 15, frameCntY * 24,
                                   15, 24); //右侧子弹
                break;
            }

        }

    }

    public void setVisble(boolean flag) {
        this.visble = flag;
    }

    public boolean isVisble() {
        return this.visble;
    }

}